| US 7,495,595 B2 | ||
| Analog-to-digital converter, receiver arrangement, filter arrangement and signal processing method | ||
| Joseph Zipper, Linz (Austria); Günther Haberpeuntner, Linz (Austria); Hermann Hofer, Linz (Austria); and Linus Maurer, Linz (Austria) | ||
| Assigned to Infineon Technologies AG, Neubiberg (Germany) | ||
| Filed on Apr. 30, 2007, as Appl. No. 11/742,307. | ||
| Prior Publication US 2008/0266161 A1, Oct. 30, 2008 | ||
| Int. Cl. H03M 1/12 (2006.01) | ||
| U.S. Cl. 341—155 [341/143] | 36 Claims |
| 1. An analog-to-digital converter, comprising:
a signal input;
a sampling unit coupled to the signal input;
a quantizer configured to provide an output word at its output depending on a signal at its input;
an output storage element coupled to the input of the quantizer;
a first filter stage comprising a first filter input coupled to an output of the sampling unit, an input storage element coupled
to the first filter input, and a first and a second auxiliary storage element that are each selectively connected in parallel
to the input storage element or to the output storage element in alternate fashion depending on a switching signal; and
a feedback path comprising a digital-to-analog converter with an input configured to receive the output word, a first weighting
element coupled between an output of the digital-to-analog converter and the output storage element, and a second weighting
element coupled between an output of the digital-to-analog converter and the first filter input.
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